These taxes can also be paid in different ways, from life for a target with Ashenmoor Liege or damage with Bonecrusher Giant to gifting life to your opponent with Shield Mare
Similarly, if The Soul Stone is already harnessed and becomes a copy of something else, it stays harnessed, though it's very likely that won't be relevant until that copy effect ends
Tutorial videos have also been left untranslated as of this first patch release
(2024-07-26) If a spell for which the gift was promised is countered, doesnt resolve (perhaps because all of its targets are illegal), or is otherwise removed from the stack, the gift wont be given
If you want to be precise, look at the mana symbols on each of your cards and add them up
Remember, how you build your MTG deck is completely up to you